Safety scaleproof automatic gage-cock



L. WHIPPLE AND Z. ONEAL.

` SAFETY scALEPRooF AUTOMATIC GAGE cocK.

APPLICATION FILED NGVz I6, 1920.

A TTUHNE Y 8 L. WHIPPLE AND Z. ONEAL. l SAFETY SCALEP'ROOF AUTOMATICGAGE CCK.

APPLICATION FILEUNOV. I6, 1920.

Patented Aug. 23, 1921.

2 SHEETS-SHEET 2.

/N VENTO/1` o, WH/Pfpe) O NEA L) WITNESSES A TTUHIVE YS UNITED TATESLESSIE WHIPPLE AND ZACK ONEAL, 0F SHREVEPORT, LOUISIANA.

SAFETY SCALEPROOF AUTOMATIC GAGE-COCK.

Spooiiication of Letters Patent.

Patented Aug. 23, 1921.

Application filed November 16, 1920. Serial No. 424,507.

To all whom it may concern Be it known that we, Lnssin VVHrrrLn andZhen. ONEM.y citizens of the United States, and residents oi'Shreveport, in the parish of Caddo and State of Louisiana, have inventedcertain new and useful Improvements in Safety Scaleproof AutomaticGage-Cocks, of which the following is a specification.

Our invention relates to improvements in gage cocks and has specialreference to that class of gage cocks using multiple valves and whichare adapted to be used in connection with locomotive boilers.

An object oi' the invention is to provide an improved separable gagecock of such construction as to admit of the main or outlet valve andstem being removed for regrind ing and other repairs without removingthe entire assembly from the boiler, and at the same time automaticallyclosing the steam or water outlet from the boiler, and thus obviatingthe necessity ol withdrawing the stealn :from the boiler.

Another object is to prevent the gage cock from becoming inoperativethrough deposit or accumulation o'l lime or scale on the valve sea-t.

Nith these and other objects in view as will appear as the descriptionproceeds, the invention consists in certain novel features ofconstruction, arrangement and combination ot parts as will behereinafter fully described and pointed out in the claims1 referencebeing had to the accompanying drawv4 ing in which- Figure 1 is a sideelevation showing the gage cock applied to a boiler. j

Fig. 2 is a vertical longitudinal section of the same.

Fig. 3 is a verticalv transverse section taken on line 3-3 of Fig. 2.

Fig. 4 is a similar view taken on line evil of Fig. 2.

Fig. 5 is a vertical transverse section taken on line 5-5 of Fig. 2. j

Fig. 6 is a perspective view of the automatically operating valveremoved `from the body portion.

Fig. 7 is a perspective view of the automatic valve cage, or cover,shown separated from the body portion.

Fig. 8 is a perspective View of the main v alve and stem removed fromthe body portion.

Similar reference characters refer to si1nilar parts throughout theseveral views.

In a practical embodiment of our invention we employ a gage cock bodyportion 10 which has a globular or spherical outlet chamber 11 fromwhich leads an outlet pipe 12. The outer end beyond the sphericalchamber constitutes a neck 13 which is eX ternally and internallythreaded and into the threaded bore 14 oi the neck is introduced themain valve 15 the stern of which is threaded as at 16 to mate with itsinternal thread; this stein is also reduced and projects beyond the bodyportion as a turning stall 17 to the end of which is rigidly attached ahand wheel 18 as usual in this type oit device.

The main valve 15 is ol the conefrustum type and has projecting from itsinner end an axial pin 19 the purpose of which will later appear. Afterthe main valve has been introduced into the neck until the threadedportion is within the outer end of the threaded neck apacking ring orgasket 2O is slipped on the handle stem against the annular shoulderformed b y the junction olf the reduced stem and the threaded portion; abonnet or gland cup 21 is then screwed on the externally threaded neckand compresses the packing gasket and holds tightly inplace and rendersthe gage cock leak prooiI at this point.

The rear wall oit Vthe spherical chamber has a conerustum valve seat 22with which the conefrustum valve mates and the valve is tightly seatedin the valve seat by screwing in the valve stem by means of the handwhee The bore 23 of the gage cock then 'extends axially rearwardly orinwardly through the body portion and then Hares or expands into anotherconefrustum valve seat 24 at the extreme inner end of body or thatportion that is to lie within the boiler.

The body is secured in the head of the boiler 25 by a tapered threadedportion 26 screwed into a similarly tapered and threaded opening in thehead of the boiler.

The inner end of the body beyond the aforesaid tapering' threadedportion is reduced Vas at 27 and externally threaded and upon thisthreaded end is screwed a cage 28 the end wall of which has an axial.opening 29 and a circular series of similar 32 is a plunger 34, whichis substantially .aol

triangular in cross section and extends into the central bore of thebody and through the same tof a pointl adjacent the main valve seat,andV its free` end is provided with a cylindrical depression or socket35 designed to receive the free end of pin 19 which extends beyond themain or outletl valve.

When in use the tapering threaded portion is screwed in the boilerliead,the auxiliaryv orcage valve being held to its seat by coiledspring 33. The gage cock now being secured to Vthe boiler, by screwingin the valve stem 16 the pin 19 will enter the recessor socket 35 in theend of plunger 34 and forcing the same will unseat the valve V32Aagainst the force of the spring 33 and the pressure of Water and steamWithin the boiler,v and permit the passage of water to the outlet 12.vVhen the main valve stem is screwed entirely into the body the mainvalve`15 becomes seated and the auxiliary valve is full open.

yIf it is now desired to regrind the valve seat or the main valve, or tomake any other repairs to the main valve chamber, the bonv net 21 isunscrewed from the neck. of the body Vand the main valve stem unscrewedfromthe body of the cock, whereupon the auxiliaryor cagevalve will beautomatically seated, the coiled spring aiding the pressure in theboiler to accomplish this result, and thus preventing ,the danger ofscalding while the repairs are made to main valve end o the device.

The plunger 34 being substantially triangular and having a loose fit inthe bore, spaces are left surrounding and as it may turn on its, axiseither by the force of the water or by a turning movement of the mainvalve stem through the pin 19, accumulation of scale will be prevented.

1. A gage cock comprising a body portion having a spherical main valvechamber, and a transverse outlet therefrom and an internally andexternally threaded neck beyond said chamber, said chamber having anaxial conefrustum valve seat in its wall opposite the neck, a valve stemthreaded into said neck, aconefrustum valve on said stem and a pinprojecting from said stem beyond said valve, a packed bonnet surroundisaid stem and screwed on said neck, the body portion having a taperingthreaded portion fitted into the boiler head and a reduced threadedendbeyond said tapering threaded portion, a cage screwed on said reducedend and having a central guide opening through its end wall and acircular series of openings surrounding said guide opening, an auxiliaryconefrustrum safety valve, within said cage, and a stem projecting fromthe larger end of said valve projecting through said guide opening, acoiled spring surroundlng said stem between the valves and the end Wallof the cage, said valve adapted to be'seatedy on a conefrustum valveseat at the end of the bore of the body portion, a

substantially triangular plunger projecting into said bore of the bodyand extending to adjacent the main valve seat, the free end of saidplunger having a recess or socket adapted to receive the end of said pinprojecting beyond the endA of the main valve stem.

2. In a gage cock, a body portion having a spherical main valve chamberadjacent one end and a manually operated, main valve screwed into suchend, said body portion adapted to be screwed into a boiler head andhaving a central bore, a cage screwed onto the otlier end of the body,said cage having a central opening in its end wall, an auxiliary valvecarrying a plunger extending into said borefand loosely mounted in. saidcage and adapted to automatically control the inner end of the bore ofthe body, said plunger cooperating with the main valve, a stemprojecting through said central opening in the end wall of the cage,said end wall having a series of openings surrounding said central guideopening.

LESSIE WHIPPLE. ZACK ONEAL.

